/*
 * Facebox (for jQuery)
 * version: 1.1 (03/01/2008)
 * @requires jQuery v1.2 or later
 *
 * Examples at http://famspam.com/facebox/
 *
 * Licensed under the MIT:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Copyright 2007, 2008 Chris Wanstrath [ chris@ozmm.org ]
 *
 * Usage:
 *  
 *  jQuery(document).ready(function() {
 *    jQuery('a[rel*=facebox]').facebox() 
 *  })
 *
 *  <a href="#terms" rel="facebox">Terms</a>
 *    Loads the #terms div in the box
 *
 *  <a href="terms.html" rel="facebox">Terms</a>
 *    Loads the terms.html page in the box
 *
 *  <a href="terms.png" rel="facebox">Terms</a>
 *    Loads the terms.png image in the box
 *
 *
 *  You can also use it programmatically:
 * 
 *    jQuery.facebox('some html')
 *
 *  This will open a facebox with "some html" as the content.
 *    
 *    jQuery.facebox(function() { ajaxes })
 *
 *  This will show a loading screen before the passed function is called,
 *  allowing for a better ajax experience.
 *
 */
(function($) {
    $.facebox = function(data, klass) {
        $.facebox.init()
        $.facebox.loading()
        $.isFunction(data) ? data.call($) : $.facebox.reveal(data, klass)
    }

    $.facebox.settings = {
        loading_image: 'http://pretty-alley.googlecode.com/svn/trunk/loading.gif',
        close_image: 'http://taobaofocus.com/wp-content/themes/magazine-basic/facefiles/closelabel.gif',
        image_types: ['png', 'jpg', 'jpeg', 'gif'],
        facebox_html: '\
  <div id="facebox" style="display:none;"> \
    <div class="popup"> \
      <table> \
        <tbody> \
          <tr> \
            <td class="tl"/><td class="b"/><td class="tr"/> \
          </tr> \
          <tr> \
            <td class="b"/> \
            <td class="body"> \
              <div class="content"> \
              </div> \
              <div class="footer"> \
                <a href="#" class="close"> \
                  <img src="' + this.close_image + '" title="close" class="close_image" /> \
                </a> \
              </div> \
            </td> \
            <td class="b"/> \
          </tr> \
          <tr> \
            <td class="bl"/><td class="b"/><td class="br"/> \
          </tr> \
        </tbody> \
      </table> \
    </div> \
  </div>'
    }

    $.facebox.loading = function() {
        if ($('#facebox .loading').length == 1) return true

        $('#facebox .content').empty()
        $('#facebox .body').children().hide().end().
        append('<div class="loading"><img src="' + $.facebox.settings.loading_image + '"/></div>')

        var pageScroll = $.facebox.getPageScroll()
        $('#facebox').css({
            top: pageScroll[1] + ($.facebox.getPageHeight() / 10),
            left: pageScroll[0]
        }).show()

        $(document).bind('keydown.facebox', function(e) {
            if (e.keyCode == 27) $.facebox.close()
        })
    }

    $.facebox.reveal = function(data, klass) {
        if (klass) $('#facebox .content').addClass(klass)
        $('#facebox .content').append(data)
        $('#facebox .loading').remove()
        $('#facebox .body').children().fadeIn('normal')
    }

    $.facebox.close = function() {
        $(document).trigger('close.facebox')
        return false
    }

    $(document).bind('close.facebox', function() {
        $(document).unbind('keydown.facebox')
        $('#facebox').fadeOut(function() {
            $('#facebox .content').removeClass().addClass('content')
        })
    })

    $.fn.facebox = function(settings) {
        $.facebox.init(settings)

        var image_types = $.facebox.settings.image_types.join('|')
        image_types = new RegExp('\.' + image_types + '$', 'i')

        function click_handler() {
            $.facebox.loading(true)

            // support for rel="facebox[.inline_popup]" syntax, to add a class
            var klass = this.rel.match(/facebox\[\.(\w+)\]/)
            if (klass) klass = klass[1]

            // div
            if (this.href.match(/#/)) {
                var url = window.location.href.split('#')[0]
                var target = this.href.replace(url, '')
                $.facebox.reveal($(target).clone().show(), klass)

                // image
            } else if (this.href.match(image_types)) {
                var image = new Image()
                image.onload = function() {
                    $.facebox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
                }
                image.src = this.href

                // ajax
            } else {
                $.get(this.href, function(data) {
                    $.facebox.reveal(data, klass)
                })
            }

            return false
        }

        this.click(click_handler)
        return this
    }

    $.facebox.init = function(settings) {
        if ($.facebox.settings.inited) {
            return true
        } else {
            $.facebox.settings.inited = true
        }

        if (settings) $.extend($.facebox.settings, settings)
        $('body').append($.facebox.settings.facebox_html)

        var preload = [new Image(), new Image()]
        preload[0].src = $.facebox.settings.close_image
        preload[1].src = $.facebox.settings.loading_image

        $('#facebox').find('.b:first, .bl, .br, .tl, .tr').each(function() {
            preload.push(new Image())
            preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
        })

        $('#facebox .close').click($.facebox.close)
        $('#facebox .close_image').attr('src', $.facebox.settings.close_image)
    }

    // getPageScroll() by quirksmode.com
    $.facebox.getPageScroll = function() {
        var xScroll, yScroll;
        if (self.pageYOffset) {
            yScroll = self.pageYOffset;
            xScroll = self.pageXOffset;
        } else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
            yScroll = document.documentElement.scrollTop;
            xScroll = document.documentElement.scrollLeft;
        } else if (document.body) { // all other Explorers
            yScroll = document.body.scrollTop;
            xScroll = document.body.scrollLeft;
        }
        return new Array(xScroll, yScroll)
    }

    // adapter from getPageSize() by quirksmode.com
    $.facebox.getPageHeight = function() {
        var windowHeight
        if (self.innerHeight) { // all except Explorer
            windowHeight = self.innerHeight;
        } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
            windowHeight = document.documentElement.clientHeight;
        } else if (document.body) { // other Explorers
            windowHeight = document.body.clientHeight;
        }
        return windowHeight
    }
})(jQuery);
